Process for the continuous processing of synthetic yarns



May 18, 1965 morn I 3,184,529

PROCESS FOR THE CONTINUOUS PROCESSING OF SYNTHETIC YARNS Filed Nov. 13.1961 3 Sheets-Sheet 1 ,1? fforhe s May 18, 1965 G. DIOTTI 3,184,529

PROCESS FOR THE CONTINUOUS PROCESSING OF SYNTHETIC YARNS Filed Nov. 13.1961 3 Sheets-Sheet 2 Q 12b 13 11 "a INVENTOR.

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PROCESS FOR THE CONTINUOUS PROCESSING OF SYNTHETIC YARNS Filed Nov. 13.1961 u SiLSA 3 Sheets-Sheet 5 INVEN @vbcinTb 171 0? 1' United StatesPatent Office aisaszs Patented May 18, 1965 3,184,529 PROCESS FOR THECONTINUGUS PROCESSHIG GF SYNTHETIC YARNS Giacinto Diotti, Milan, Italy,assignor to Studi e Brevetti Applicazioni Tessili, Milan, Italy, alimited-liability company of Italy Filed Nov. 13, 1961, Set. No. l51,769Claims priority, application Italy, Nov. 12, N60, 19,491/60 4 Claims.(Cl. 264--34tl) It is generally known that when spinning synthetic yarnsand, in particular, viscose rayon yarns, using continuous processes, itis very highly desirable that one be able to simultaneously process aplurality of threads using the same device. The word thread here meansthe group of filaments originating in a single spinnerette or nozzle.

Synthetic yarns, in particular, viscose rayon, must be subjected to aset of wet processes which are carried out in collection and feeddevices which can have different structures depending on the case. For.a long time it had been impossible to spin continuously andsimultaneously on the same device a plurality of threads because thed-iiferent threads came to stick to one another, especially becauseduring part of the process they were in a semi-plastic or plastic state.

According to the prior Patent No. 2,883,259, the problem of thecontinuous spinning of a plurality of threads on the same device issolved by causing such threads to travel through an essentially helicalpath (the word helical in this context is not to be taken as having itsgeometrical definition and is intended as approximate), so arrangedthat, taking the vaircus threads in succession, the path described byeach thread is enclosed within and partially tangent to or touching uponthe path of the following thread. This process is achieved by means of adevice which comprises a main processing roller, divided up amongvarious processing areas and a plurality of feed rollers of lesserdiameter, suitably arranged at different distances from the main roller,having smaller diameters than the latter and being inclined at an anglein respect to it. Thanks to the in vention embodied in the above namedpatent the spinning of a plurality of threads simultaneously andcontinuously, generally in the same number of threads as there arerollers, can be done without dificulty and the various threads do notadhere to one another but, instead, remain completely separate from oneanother, even if they do touch one another during part of their travel.

This invention has as its object a further improvement in saidcontinuous spinning process. It has been found that the spinning can befurther improved by causing a plurality of threads to travel through ahelical path such that the successive turns of each thread will bemaintained at a distance apart from one another, even if the turns ofdifferent threads are allowed to touch one another and, in fact, theymay very well touch during part of their travel.

In a device having the general structure of the device described in thepatent mentioned above and thus comprising a main roller and a pluralityof feed rollers, the spacing between the successive turns of each threadis achieved by giving the device a plurality of thread guides and byplacing said thread guides in such a spatial relationship to the paththrough which the threads travel that one and one only turn of eachthread and, in general, all the threads being processed, will passthrough each interspace between any two adjacent thread guides. Thenumber of turns passing through each interspace could be further reducedbut by doing so would lead to :a useless multiplication of the number ofthread guides.

Further characteristics and advantages of this invention will becomeapparent from the description which follows herein, with reference tothe accompanying drawings, wherein:

'FIG. 1 is a device embodying the invention, shown in perspective, onlya few of the turns of the various threads being shown;

FIG. 2 shows the same device seen from above;

FIG. 3 shows the same device along a section taken perpendicular to theaxis of the main roller;

FIG. 4 shows an enlarged detail taken from FIG. 3;

FIGS. 5a and 5b are transverse sections of the thread guide group in twopositions.

In the drawings the main roller or processing roller is indicated byit). The feed rollers are shown at 11a and 11b. Naturally, all therollers are mounted on a frame which is neither described nor shown.

The threads are designated by 12, accompanied, where necessary, by thesmall letter corresponding to the feed roller on which the particularthread rests.

13 designates, in general, a first set of thread guides which arearranged at the ends of the various processing areas. Thread guides ofthis type are alsoto be found in spinning machines of types alreadyknown and are used to allow the threads to pass over the separatingflanges dealt with further on.

The processing areas of the main roller are indicated by the numbers 15to 21, inclusive, and the adjacent areas are separated from one anotherby sets of flanges each set being indicated by a number from 22 to 27,inclusive. A single flange is to be found at the beginning of theprocessing roller, designated by the number 28. The processing fluidsare fed to the roller in a manner already known, by way of lines 29, ofwhich only one is shown diagrammatically in FIG. 3.

The number 30 indicates, generally, the thread guides which are used toseparate the successive turns of each thread from one another.

As can be seen from the drawings, said thread guides are divided upamong various groups, each corresponding to a single processing area,while the thread guides 13 serve as guides in a way which is renderedparticularly obvious by FIG. 2, for the passage of the various threadsfrom one processing area to another, passing above the separatingflanges. This spinning machine is, of course, rendered complete by areservoir to hold the various fluids, divided by partitions whichpenetrate into the interspaces between the flanges of each set from 21to 27, inelusive.

According to this invention, the paths through which the threads travelare thus determined in relation to thread guides 39, in such a way thatone turn of each thread 12a, 12b, will pass through the interspacebetween the two successive thread guides 30 and that a thread guide 30will be located between each set of turns and the set which follows ofthe same thread. This can be seen particularly well by comparing FIGS. 1and 2. In FIG. 1 only a few turns of thread have been shown. It will beseen how the corresponding turns of the various threads, which in thisparticular case are two in number, but which, naturally, in other casescould be of even a considerable number, are practically in contact withone another, to such an extent that in FIG. 1 they are shown by a singleline and that they separate from one another on passing to theirrespective feed rollers as is clearly shown in FIG. 1, remaining almoston the same vertical plane as shown by FIG. 2, excepting where thethreads pass from one processing area to the next. In the same way, itis very clearly shown in FIG. 2 how the adjacent turns of each threadare separated, passing through the various interspaces created by thegroup of thread guides 30, which, taken all together, go to make up whatWe will call the comb 31.

In one preferred embodiment of the invention, means are provided toenable the thread guides to take up the desired position between theturns of the thread after the turns have already formed. To this endcomb 31 is constituted as shown in FIGS. 5a and 511. Thread guides 13are mounted on a longitudinal stem 32 and each is held by an arc-shapedpiece 33. Thread guides 30 (only two of whichare shown in FIG. 5) aremounted on (or incorporated in) a plate 34, fixed to a hollow cylinder35,

having a slot 36 and another 37, said cylinder being so assembled thatit can turn above stem 32. The unit as a whole is as shown in FIG. 5:1for assembly and as can be seen, the cylinder 35 can first be slipped onover the stem.

32 and then the thread guides 13 can be assembled through the slots 36and 37 and mounted using washers 38 on pieces 33.

, The rotation of the cylinder 35 on stem 32 is controlled manually bymeans of knobs 39 which are shown in FIGS. 1 and '2. Tostart up thespinning machine the thread guides 30 are made to turn downwardsand theyare brought to the position shown in FIG. 5b, which is made possible bythe presence of slot 36, which can thus slide in respect to the threadguides 13. Once the spinningmachine has been started up, when thethreads are arranged in turns with a pitch between turns determined bythe distance between the feed rollers and the processing roller, by theangle of inclination of said rollers and by the ratios 4 invention,itself, covers any and all variants or modifications such as may be madeby a person expert in-the art.

What I claim is:

l. A process for the continuous processing of yarns, comprising loopinga plurality of individual strands of yarn along essentially helicalpaths including a predetermined number of loops of each strand about acommon cylindrical main surface, looping each individual strand about aseparate individual cylindrical auxiliary surface associated with saidcylindrical main surface, the several auxiliary surfaces each being 'ata different location in respect to said main surface causing all of saidstrands to progress continuously in their looped individual configurations, continuously applying treatments thereto while they are soprogressing, causing said plurality of individual strands of yarn toguidedly loopabout said common main surface in loops through guidepassages including a pre determined number of guide passages, all saidindividual strands being in groups wherein the grouped strands are inmutual contacting relationship in each one of said guide passages.

2. A process as set forth in claim 1 wherein each in dividual strand ofyarn contacts other strands in said plurality in individual loopportions about said main surface between the diameters of the rollers,cylindrical support is to turn in a counterclockwise direction using theknobs 39 and the thread guides 30 return to the position shown in FIG.5a, in which position they engage with the threads in the manner shownin FIGS. 1 and 2. Naturally, the interval between the various threadguides is determined in such a way as will correspond to the pitchbetween turns of the threads.

As can be seen from the drawings, it is preferable that the threadguides be tapered in such a way as will aid the threads to enter theinterspaces between thern.

FIG. 4, in this respect, shows the relationship between the twopositions of the thread guide 30 and that of the threads, the inactiveposition of the thread guides being that shown in dotted or brokenlines.

This invention has been described above in reference to one particularembodiment thereof, to be treated as a nonrestrictive example forpurposes of illustration, while the and is guidedly spaced from itscorresponding adjacent loopportions along the said individual paththereof.

33. A process as set forth in claim' 1, wherein said grouped pluralityof strands is progressed through an individual guide passage at alocation adjacent to said main surface, at any individual loop includedin said essentially helical paths.

4. A process as set forth in claim 1 wherein said strands of yarnsconsist of viscose rayon. 7

References Cited by the Examiner UNITED STATES PATENTS 2,535,426 12/50Keight '1s s 2,883,259 4/59 -Severini 8'151.1

FOREIGN PATENTS 583,990 1/47 GreatBritain.

ALEXANDER H. BRODMERKEL, Primary Examiner.

WILLIAM J. STEPHENSON, MORRIS LIEBMAN,

Examiners.

1. A PROCESS FOR THE CONTINUOUS PROCESSING OF YARNS, COMPRISING LOOPINGA PLURALITY OF INDIVIDUAL STRANDS OF YARN ALONG ESSENTIALLY HELICALPATHS INCLUDING A PREDETERMINED NUMBER OF LOOPS OF EACH STRAND ABOUT ACOMMON CYLINDRICAL MAIN SURFACE, LOOPING EACH INDIVIDUAL STRAND ABOUT ASEPARATE INDIVIDUAL CYLINDRICAL AUXILIARY SURFACE ASSOCIATED WITH SAIDCYLINDRICAL MAIN SURFACE, THE SEVERAL AUXILIARY SURFACES EACH BEING AT ADIFFERENT LOCATION IN RESPECT TO SAID MAIN SURFACE CAUSING ALL OF SAIDSTRANDS TO PROGRESS CONTINUOUSLY IN THEIR LOOPED INDIVIDUALCONFIGURATIONS, CONTINUSOULY APPLYING TREATMENTS THERETO WHILE THEY ARESO PROGRESSING, CAUSING SAID PLURALITY OF INDIVIUAL STRANDS OF YARN TOGUIDEDLY LOOP ABOUT SAID COMMON MAIN SURFACE IN LOOPS THROUGH GUIDEPASSAGES INCLUDING A PREDETERMINED NUMBER OF GUIDE PASSAGES, ALL SAIDINDIVIDUAL